Prediction 196

Duration 20 years (02005-02025)

“I predict that global warming denialists such as MIT professor Richard Lindzen will be shown to be wrong over the next 20 years as global warming continues. Specifically, I believe the scientific consensus that temperatures are likely to increase by .3 degrees Celsius over the next 20 is more accurate than the Lindzen/denialist position that temperatures are as likely to decrease as increase. Choosing a prediction that is halfway between the consensus and the denialist viewpoints, I predict that temperatures will increase by at least .15 degrees Celsius from 2005 to 2025. This bet is open to anyone who wants to accept it.”

Predictor
Brian A. Schmidt

Challenger
TBA

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Schmidt’s Argument

MIT professor Richard Lindzen is the most famous of the global warming denialists, and considered the model for the protagonist in the well known science fiction novel, State of Fear. He said in 2004 that temperatures are as likely to decrease as they are to increase - in other words, the middle point prediction for him is no change in average temperatures. By contrast, the likely temperature range announced by the United Nations Integovernmental Panel on Climate Change is an increase of .2 to .4 degrees Celsius over 20 years. I choose the middle of that range, .3 Celsius, for purposes of facilitating a bet. Halfway between the midpoint I chose on the IPCC range and the midpoint for a denialist (no change) is .15 degrees Celsius. Anyone who thinks Lindzen and the denialists are right should be attracted to this bet.

I believe there is a plethora of information for why my prediction is likely to be correct, starting here:

http://www.realclimate.org/index.php?p=161

Schmidt was challenged to a bet!

Brian A. Schmidt is negotiating the terms of a bet about this prediction. It will soon be added to Bets on the Record.

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Bet 196

"I predict that global warming denialists such as MIT professor Richard Lindzen will be shown to be wrong over the next 20 years as global warming continues. Specifically, I believe the scientific consensus that temperatures are likely to increase by .3 degrees Celsius over the next 20 is more accurate than the Lindzen/denialist position that temperatures are as likely to decrease as increase. Choosing a prediction that is halfway between the consensus and the denialist viewpoints, I predict that temperatures will increase by at least .15 degrees Celsius from 2005 to 2025. This bet is open to anyone who wants to accept it."

One sure thing: change. Three tenths of a degree is well within the measurement errors of the base line, so this bet could go either way or both ways ...

Most "denialists" would be unsurprised by a 0.15 C increase by 2025, even though we have recently seen cooling. That implies about 0.6C by the end of the century which is less than Earth had during the Mediaval warming, let alone the late Roman period & is therefore not remotely the catastrophic warming we are promised.

If the author wishes to put up a bet that there will be catastrophic warming as forecast (somewhere between the 3 C forecast by Sir David King & the "Antarctica being the only inhabitable continent forecast by Sir David King, or the degree every 20 years forecast by Hansen or indeed the 20 ft sea level rise forecast by Saint Al I would be much more interested in taking him up. Currently he has put up a bet that the "denialists" are broadly right which I am not willing to bet against.

I agree with Neil: the bet as stated would support the skeptic's view (denialist is rather derogatory, as if science can ever be settled!). A temperature rise of 0.15C is noise, and should not attract any precious ressources to prevent it. The bet should also determine what data series will be used for temperatures: GISS or UAH? The divergence between the two data sets (against their 1979-1998 average) was .46C in Dec. 2008, 3 times greater than the bet's level. I think Brian should step up to the plate, and set his temperature target at the catastrophic level of 0.6C per decade (1.2C in 20years), which is closer to the level that should cause concern and invite a policy response.

I agree with Neil

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